浅埋偏压隧道洞口段合理开挖工序及受力特征分析

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Abstract The portal section of shallow tunnel with unsymmetrical loadings is a typical three-dimensional problem，the main initial geostress of which is gravity stress. The relatively real initial geostress can be obtained by accurately simulating the topographical and geologic conditions，which can increase the reliability of the calculation result. Analysis of three-dimensional simulation in the excavation process of portal section of shallow tunnel with unsymmetrical loadings of Laozhai tunnel in Guizhou province of Xiamen—Chengdu Expressway is conducted by using the fast Lagrangian analysis of continua in 3 dimensions(FLAC3D) program. Comparing excavated shallow part firstly with excavated deep part firstly by the annular pilot heading conservation core soil method，the changes of deformations and stresses of rock mass and supporting structure of Laozhai tunnel in different excavation sequences are obtained. Actual tunnel excavation sequence is optimized by comparison；and the rationality of excavation scheme is explained by the method of released load and the method of principal stress trace. Finally，through analyzing and calculating the measured data of three measured sections in site，the stress characteristics of surrounding rock and supporting structure of Laozhai tunnel portal section are obtained. The analysis results can provide technical guidance for the design and construction of Laozhai tunnel and the tunnel which has the similar topographical and geologic conditions.

Key words： tunnelling engineering shallow tunnel with unsymmetrical loadings excavation sequence deformation contact pressure

Received: 11 June 2010

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http://www.rockmech.org/EN/Y2011/V30/IS1/3066

[1]	王祥秋，杨林德，高文华. 高速公路偏压隧道施工动态监测与有限元仿真模拟[J]. 岩石力学与工程学报，2005，24(2)：284-289. (WANG Xiangqiu，YANG Linde，GAO Wenhua. Dynamic monitoring and FEM simulation analysis of an expressway tunnel with unsymmetrical loadings[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(2)：284-289.(in Chinese))
[2]	丁文其，王晓形，李志刚，等. 龙山浅埋大跨度连拱隧道施工方案优化分析[J]. 岩石力学与工程学报，2005，24(22)：4 042-4 047. (DING Wenqi，WANG Xiaoxing，LI Zhigang，et al. Optimal analysis of construction schemes for shallow large span Longshan twin tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(22)：4 042-4 047.(in Chinese)) " target="_blank">
[4]	陈秋南，张永兴，陈建功，等. 偏压双连拱公路隧道围岩稳定性动态预测分析[J]. 重庆建筑大学学报，2005，27(1)：62-66.(CHEN Qiunan，ZHANG Yongxing，CHEN Jiangong，et al. Dynamic prediction analysis of surrounding rocks stability for non-symmetric double-arch highway tunnel[J]. Journal of Chongqing Jianzhu University，2005，27(1)：62-66.(in Chinese)) " target="_blank">
[5]	段海澎，徐干成，刘保国. 富溪偏压连拱隧道围岩与支护结构变形和受力特征分析[J]. 岩石力学与工程学报，2006，25(增2)：3 763-3 768.(DUAN Haipeng，XU Gancheng，LIU Baoguo. Analysis of deformation and stress characteristics of surrounding rock and supporting structure of Fuxi twin tunnel with unsymmetrical loadings[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.2)：3 763-3 768.(in Chinese)) " target="_blank">
[6]	刘涛，沈明荣，袁勇. 偏压连拱隧道围岩稳定性模型试验与数值分析[J]. 同济大学学报：自然科学版，2008，36(4)：460-465.(LIU Tao，SHEN Mingrong，YUAN Yong. Model test and 3D numerical simulation study on surrounding rock stability for non-symmetric double-arch tunnel[J]. Journal of Tongji University：Natural Science，2008，36(4)：460-465.(in Chinese)) " target="_blank">
[3]	王英学，周佳媚，高波. 偏压滑坡地段围岩受力特征测试分析[J]. 岩土力学，2002，23(6)：792-794.(WANG Yingxue，ZHOU Jiamei，GAO Bo. Measurement and analysis of stress conditions of tunnel?s surrounding rock masses at deviation pressured landslide section[J]. Rock and Soil Mechanics，2002，23(6)：792-794.(in Chinese)) " target="_blank">
[9]	钟新樵. 土质偏压隧道衬砌模型试验分析[J]. 西南交通大学学报，1996，31(6)：602-606.(ZHONG Xinqiao. An analysis of model tests on earth tunnel with unsymmetrical loadings[J]. Journal of Southwest Jiaotong University，1996，31(6)：602-606.(in Chinese))
[10]	周玉宏，赵燕明，程崇国. 偏压连拱隧道施工过程的优化研究[J]. 岩石力学与工程学报，2002，21(5)：679-683.(ZHOU Yuhong，ZHAO Yanming，CHENG Chongguo. Optimum analysis on the construction process for double-arch tunnel with unsymmetrical loadings[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(5)：679-683.(in Chinese)) " target="_blank">
[13]	朱正国，乔春生，高保彬. 浅埋偏压连拱隧道的施工优化及支护受力特征分析[J]. 岩土力学，2008，29(10)：2 747-2 752.(ZHU Zhengguo，QIAO Chunsheng，GAO Baobin. Analysis of construction optimization and stress characteristic of supporting structure of shallow multi-arch tunnel with unsymmetrical loadings[J]. Rock and Soil Mechanics，2008，29(10)：2 747-2 752.(in Chinese)) " target="_blank">
[14]	何川，李永林，林刚. 连拱隧道施工全过程三维有限元分析[J]. 中国铁道科学，2005，26(2)：34-38.(HE Chuan，LI Yonglin，LIN Gang. 3D FEM numerical analysis for the whole construction process of twin-arch tunnel[J]. China Railway Science，2005，26(2)：34-38.(in Chinese)) " target="_blank">
[17]	高俊合，赵维炳，李兴文. 深开挖有限元分析中释放荷载模拟——三种常用方法比较及改进的Mana法[J]. 河海大学学报，1999，27(1)：47-52.(GAO Junhe，ZHAO Weibing，LI Xingwen. Simulation of unloading due to excavation in finite element analysis—modified Mana method based on comparison of three methods[J]. Journal of Hohai University，1999，27(1)：47-52.(in Chinese)) " target="_blank">
[18]	HOEK E，BROW E T. 岩石地下工程[M]. 连志升，田良灿，王维德，等译. 北京：冶金工业出版社，1986：76-78.(HOEK E，BROWN E T. Underground engineering of rock[M]. Translated by LIAN Zhisheng，TIAN Liangcan，WANG Weide，et al. Beijing：China Metallurgical Industry Press，1986：76-78.(in Chinese)) " target="_blank">
[7]	谢红强，何川，林刚. 开挖工况对偏压连拱隧道结构及上覆山体稳定性的影响[J]. 现代隧道技术，2007，44(1)：32-36.(XIE Hongqiang，HE Chuan，LIN Gang. Effects of construction sequence of non-symmetric double-arch tunnel on the stability of tunnel structure and the overlaying massif[J]. Modern Tunnelling Technology，2007，44(1)：32-36.(in Chinese)) " target="_blank">
[8]	杨小礼，眭志荣. 浅埋小净距偏压隧道施工工序的数值分析[J]. 中南大学学报：自然科学版，2007，36(4)：764-770.(YANG Xiaoli，SUI Zhirong. Numerical simulation of construction sequence for small span shallow tunnels with unsymmetrical loadings[J]. Journal of Central South University：Science and Technology，2007，36(4)：764-770.(in Chinese)) " target="_blank">
[11]	刘元雪，蒋树屏，赵尚毅. 浅埋黄土连拱隧道施工方案优化研究[J]. 地下空间与工程学报，2005，1(6)：944-947.(LIU Yuanxue，JIANG Shuping，ZHAO Shangyi. Optimizing analysis for construction schemes of shallow multi-arch loess tunnel[J] Chinese Journal of Underground Space and Engineering，2005，1(6)：944-947.(in Chinese)) " target="_blank">
[12]	张志强，何川. 偏压连拱隧道优化施工的研究[J]. 岩土力学，2007，28(4)：723-727.(ZHANG Zhiqiang，HE Chuan. Research on optimized construction procedure for double-arch tunnel with unsymmetrical loadings[J]. Rock and Soil Mechanics，2007，28(4)：723-727.(in Chinese)) " target="_blank">
[15]	李术才，王书法，朱维申，等. 台湾软弱岩盘隧道变形预估系统数值模拟研究[J]. 岩土工程学报，2001，23(5)：540-543.(LI Shucai，WANG Shufa，ZHU Weishen，et al. Research on numerical simulation of deformation of soft rock mass tunnels in Taiwan[J]. Chinese Journal of Geotechnical Engineering，2001，23(5)：540-543.(in Chinese))
[16]	刘小军，张永兴. 地形因素及围岩类别对偏压隧道的影响效应分析[J]. 西安建筑科技大学学报：自然科学版，2010，42(2)：205-209.(LIU Xiaojun，ZHANG Yongxing. Analysis of influence of topographic factors and surrounding rock classification on the tunnel with unsymmetrical loadings[J]. Journal of Xi?an University of Architecture and Technology：Natural Science，2010，42(2)：205-209.(in Chinese)) " target="_blank">